Patent US4773359A successfully refreshed from Google Patents.
US4773359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control for overhead camshaft engines
Assignee: Fiat Auto SpA
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Filing: 1987-10-06
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Granted: 1988-09-27
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Expires: 2007-10-06
Abstract
Abstract The subject of the invention consists of an overhead valve control for internal combustion engines provided with at least three valves per cylinder controlled through at least one overhead camshaft (1). The control is designed simultaneously to control two mated and parallel valves (3), and is so shaped as to be actuated by a variable profile cam (2).
Inventors
- 👤 Andrea Titolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:25
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/143; F01L1/26; F01L13/00; F01L13/0015; F01L13/0036; F01L13/0042; F01L2307/00; F02; F02B; F02B2275/00; F02B2275/18; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F2001/244; F02F2001/245
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
Internal combustion engine comprising at least one cylinder, a cylinder head, two overhead mated valves associated with the cylinder and having respective stems parallel to each other, an over-head camshaft having a variable-profile cam surface and follower means between said cam surface and the stems of said two mated valves comprising a swinging contact shoe in engagement with the cam surface and a shoe-holder saddle, wherein said shoe-holder saddle is provided with two symmetrically sideways displaced prongs adapted to operate said valve stems, clearance adjustment spacers being interposed between said prongs and said valve stems, and wherein the shoe-holder saddle is also provided with a cylindrical guide tang extending between said two prongs and fitting within a complementary seat disposed in the cylinder head, and wherein said cylindrical tang is provided with an axial through hole and with a radial inlet orifice communicating with one end of said axial hole and said shoe-holder saddle has a channel-shaped contact wall with the shoe communicating with the other end of the said axial hole of the tang.
Claim 2
Dependent Claim
175 words
Internal combustion engine comprising at least one cylinder, a cylinder head, two overhead mated valves associated with the cylinder and having respective stems parallel to each other, an over-head camshaft having a variable-profile cam surface and follower means between said cam surface and the stems of said two mated valves comprising a swinging contact shoe in engagement with the cam surface and a shoe-holder saddle, wherein said shoe-holder saddle is provided with two symmetrically sideways displaced prongs adapted to operate said valve stems, clearance adjustment spacers being interposed between said prongs and said valve stems, and wherein the shoe-holder saddle is also provided with a cylindrical guide tang extending between said two prongs and fitting within a complementary seat disposed in the cylinder head, and wherein said cylindrical tang is provided with an axial through hole and with a radial inlet orifice communicating with one end of said axial hole and said shoe-holder saddle has a channel-shaped contact wall with the shoe communicating with the other end of the said axial hole of the tang.
Claim 3
Dependent Claim
22 words
Internal combustion engine according to claim 1, further comprising a lubrication system, wherein said inlet orifice is connected with said lubrication system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |